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from __future__ import annotations
import os
import struct
from datetime import date
from datetime import datetime
from datetime import timedelta
from math import copysign
from typing import TYPE_CHECKING
from typing import TypeVar
from typing import overload
import pendulum
from pendulum.constants import DAYS_PER_MONTHS
from pendulum.formatting.difference_formatter import DifferenceFormatter
from pendulum.locales.locale import Locale
if TYPE_CHECKING:
# Prevent import cycles
from pendulum.duration import Duration
with_extensions = os.getenv("PENDULUM_EXTENSIONS", "1") == "1"
_DT = TypeVar("_DT", bound=datetime)
_D = TypeVar("_D", bound=date)
try:
# nopycln: file # noqa: E800
if not with_extensions or struct.calcsize("P") == 4:
raise ImportError()
from pendulum._extensions._helpers import PreciseDiff
from pendulum._extensions._helpers import days_in_year
from pendulum._extensions._helpers import is_leap
from pendulum._extensions._helpers import is_long_year
from pendulum._extensions._helpers import local_time
from pendulum._extensions._helpers import precise_diff
from pendulum._extensions._helpers import timestamp
from pendulum._extensions._helpers import week_day
except ImportError:
from pendulum._extensions.helpers import PreciseDiff # type: ignore[misc]
from pendulum._extensions.helpers import days_in_year
from pendulum._extensions.helpers import is_leap
from pendulum._extensions.helpers import is_long_year
from pendulum._extensions.helpers import local_time
from pendulum._extensions.helpers import precise_diff # type: ignore[misc]
from pendulum._extensions.helpers import timestamp
from pendulum._extensions.helpers import week_day
difference_formatter = DifferenceFormatter()
@overload
def add_duration(
dt: datetime,
years: int = 0,
months: int = 0,
weeks: int = 0,
days: int = 0,
hours: int = 0,
minutes: int = 0,
seconds: float = 0,
microseconds: int = 0,
) -> datetime:
...
@overload
def add_duration(
dt: date,
years: int = 0,
months: int = 0,
weeks: int = 0,
days: int = 0,
) -> date:
pass
def add_duration(
dt: date | datetime,
years: int = 0,
months: int = 0,
weeks: int = 0,
days: int = 0,
hours: int = 0,
minutes: int = 0,
seconds: float = 0,
microseconds: int = 0,
) -> date | datetime:
"""
Adds a duration to a date/datetime instance.
"""
days += weeks * 7
if (
isinstance(dt, date)
and not isinstance(dt, datetime)
and any([hours, minutes, seconds, microseconds])
):
raise RuntimeError("Time elements cannot be added to a date instance.")
# Normalizing
if abs(microseconds) > 999999:
s = _sign(microseconds)
div, mod = divmod(microseconds * s, 1000000)
microseconds = mod * s
seconds += div * s
if abs(seconds) > 59:
s = _sign(seconds)
div, mod = divmod(seconds * s, 60) # type: ignore[assignment]
seconds = mod * s
minutes += div * s
if abs(minutes) > 59:
s = _sign(minutes)
div, mod = divmod(minutes * s, 60)
minutes = mod * s
hours += div * s
if abs(hours) > 23:
s = _sign(hours)
div, mod = divmod(hours * s, 24)
hours = mod * s
days += div * s
if abs(months) > 11:
s = _sign(months)
div, mod = divmod(months * s, 12)
months = mod * s
years += div * s
year = dt.year + years
month = dt.month
if months:
month += months
if month > 12:
year += 1
month -= 12
elif month < 1:
year -= 1
month += 12
day = min(DAYS_PER_MONTHS[int(is_leap(year))][month], dt.day)
dt = dt.replace(year=year, month=month, day=day)
return dt + timedelta(
days=days,
hours=hours,
minutes=minutes,
seconds=seconds,
microseconds=microseconds,
)
def format_diff(
diff: Duration,
is_now: bool = True,
absolute: bool = False,
locale: str | None = None,
) -> str:
if locale is None:
locale = get_locale()
return difference_formatter.format(diff, is_now, absolute, locale)
def _sign(x: float) -> int:
return int(copysign(1, x))
# Global helpers
def locale(name: str) -> Locale:
return Locale.load(name)
def set_locale(name: str) -> None:
locale(name)
pendulum._LOCALE = name
def get_locale() -> str:
return pendulum._LOCALE
def week_starts_at(wday: int) -> None:
if wday < pendulum.SUNDAY or wday > pendulum.SATURDAY:
raise ValueError("Invalid week day as start of week.")
pendulum._WEEK_STARTS_AT = wday
def week_ends_at(wday: int) -> None:
if wday < pendulum.SUNDAY or wday > pendulum.SATURDAY:
raise ValueError("Invalid week day as start of week.")
pendulum._WEEK_ENDS_AT = wday
__all__ = [
"PreciseDiff",
"days_in_year",
"is_leap",
"is_long_year",
"local_time",
"precise_diff",
"timestamp",
"week_day",
"add_duration",
"format_diff",
"locale",
"set_locale",
"get_locale",
"week_starts_at",
"week_ends_at",
]
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